white cap sill plate sealant tape - wc5229 is designed to provide a complet weather barrier seal between treated wood and concrete substrates for residential and commercial construction. Can also be used in sheet metal assemblies, hvac systems and window installations, etc. Where a moldable gasket-like sealant is required. Features: mold resistant, high performance butyl rubber compound. Exceeds astm and aama standards for solids, % elongation (200 degrees 10 minutes) uses resistance, migrations and temperature range. Uniform building code class 1. Meets ul-723 flame spread and smoke generation ratings (25/50). Adhesion to treated wood and concrete substrates. Application temperature ranges 0 degrees to 120 degrees f. Weatherability: excellent-no crack or chalking-quv, 340a lamps for 1000 hours. 1/8" x 1/2" x 30' rolls.